Yanmar BY Series Service Manual page 117

Camshaft and Timing Gear Train
12/05
4. Install bearing caps in their proper locations.
• Intake camshaft bearing caps are marked
A1 - A7.
• Exhaust camshaft bearing caps are marked
E1 - E7.
5. Lightly oil the threads of all bolts and install
finger-tight.
6. Tighten all bearing caps evenly in 1/2-turn
increments, starting at the center and working
toward each end, until all bearing caps are
seated.
7. Tighten all bearing cap bolts to 10 N·m
(89 in.-lb).
8. Install chain on sprocket and install sprocket on
intake camshaft. Tighten bolts until snug.
9. Install guide rails.
10. Apply medium strength thread lock and sealer
to the threads of the guide rail bearing pins.
Install and tighten to 20 N·m (177 in.-lb).
11. Adjust camshaft timing. See Adjust Camshaft
Timing on page 5-45.
12. Remove flywheel holding tool and install
protective cap.
13. Remove chain tensioner locks.
14. Install alternator drive belt. See Remove and
Install Alternator on page 11-5.
15. Fill engine with coolant. See Drain and Fill
Closed Cooling System on page 7-10.
16. Install cylinder head cover. See Remove and
Install Cylinder Head Cover on page 5-17.
BY Service Manual
© 2009 Yanmar Marine International
ENGINE
5-55